Dental mold



(No Model.)

L. F. SEEGER, Jr.

DENTAL MOLD.

No. 432,909. Patented July 22, 189.0.

TNE News Pawns cu, wummmu, msumunm, a. c.

UNITED STATES PATENT OFFICE.

LOUIS F. SEEGER, JR, OF AHNAPEE, WVISOONSIN.

D E N TA L M O L D.

SPECIFICATION forming part of Letters Patent No. 432,909, dated July 22,1890.

Application filed January 16, 1890. $erial No. 337,160P- (No model.)

To all whom it may concern:

Be it known thatl, LOUIS F. SEEGER, In, a citizen of the United States,residing at Ahnapee, in the county of Kewaunee and State of \Visconsin,have invented certain new and useful Improvements in Dental Molds; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, suchas will enable others skilled in theart to which it appertainsto make and use the same, reference beinghadto theaccompanying drawings, and to letters of reference marked thereon,which form a part of this specification.

This invention pertains to certain new and useful improvements in dentalmolds, having for its object the production of an improved two-part orsectional mold capable of contraction at its wider end, so as to beeasilyinserted in a patients mouth in securing a cast ing or impressionof the jaw.

The invention comprises a mold composed of two sections or trays hingedor pivotally connected together at their meeting ends, so as to movelaterally, and provided with rearwardly-extending arms, by which saidparts or sections can be contracted at their wider ends for insertion ina patients mouth and subsequently opened or expanded, so as to secure animpression on the plastic compound held thereby, said sections havingtelescoped ends, all substantially as hereinafter fully set forth, andparticularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan View of my improvedmold, showing the sections in dotted lines in their contracted position.Fig. 2 is a similar viewwith the sections separated. Fig. 3 is a rearend View, parts being shown in section.

Referring to the drawings, A designates the mold, composed of twosections or trays a a, having concaved under surfaces for holdingplaster-ofparis or other plastic com-- pound. These sections are unitedtogether at their inner ends by a hinge a or other pivotal connectionsecured to short lugs (t From section a projects a curved flange Ztelescoping the concaved surface of the other section a, so as to closethe opening formed between their meeting ends when the latter arecontracted, as shown in dotted lines,Fig. 1.

B B are two handles rigidly secured to the sections a a, so as tooperate the same, one of said handles being provided with upper andlower parallel lugs b, between which the other handle is designed tofit, said lugs serving to hold and guide the handles.

In practice the mold is first contracted the desired extent at its outerend by means of the handle B, and the plaster-of-paris or other plasticcompound is then insertedin the concaved sections or trays, after whichthe mold is inserted in the patients mouth and the inner ends of saidsections extended by the handle thereof. An impression is then securedof the jaw of the patients mouth, when the mold can easily be removed orslid out Without causing the least inconvenience to the patient andavoiding abrasion of the lips or corners of the mouth.

The advantages of my invention will be apparent to those skilled in theart, and it Will be especially observed that the injury or hurting of apatients mouth in the insertion of a mold is entirely obviated, and thatan impression can be readily and easily secured without the delay orannoyance usually at ten dant thereon.

I'claim as my invention-- 1. A dental mold composed of two concavedsections or trays pivotally connected together and having overlapping ortelescoping inner ends, substantially as set forth.

2. A dental mold composed of two pivoted sections or trays havingconcaved under surfaces, one of said sect-ions or trays having a curvedflange 1) independent of the pivot projecting from its inner end andtelescoping the opposite end of the other section or tray, substantiallyas set forth.

3. A dental mold composed of two pivoted sections or trays pivotallyconnected together and the handles projecting from the meeting ends ofsaid sections or trays, one of said handles having upper and lowerparallel lugs b projecting from its inner edge independent of the pivot,substantially as set forth.

4. As an improved article of manufacture, In testimony whereof I afiixmy signature in a dental mold consisting of two pivoted secpresence oftwo witnesses. tions or trays having concaved under surfaces, a curvedflange projecting from the LOUIS F. SEEGER, JR. 5 inner end of one ofsaid sections or trays, the

handles, and the parallel lugs b projecting WVitnesses: from one of saidhandles independent of th GEO. H. SNYDER, pivot, substantially as setforth. O. G. BOALT.

